H

Select a term to view the definition:
  • H. pylori infection

    Professional Description:

    Helicobacter pylori (H. pylori) is a spiral-shaped bacterium that is found in the gastric mucous layer or adherent to the epithelial lining of the stomach.

  • H2 receptor antagonists

    Professional Description:

    These medications block the production of acid from the stomach

  • Half and half nails

    Professional Description:

    A division of the nail by a transverse line into a proximal dull white part and a distal pink/brown part.

  • Hazard Identification

    Professional Description:

    The first step in a risk assessment, which is concerned with the collection, organization, and evaluation of all information pertaining to the toxic properties of a nutrient.

  • Health literacy

    Professional Description:

    The ability to access and understand health information as well as use the information to improve health of self, family and community. The ability to read and write is not required to access and use health information.

  • Helminth parasites

    Professional Description:

    Worms classified as parasites and include roundworms (e.g. Trichinella), pinworms, tapeworms and flukes.

  • heme

    Professional Description:

    The deep red iron-containing prosthetic group C34H32N4O4Fe of hemoglobin and myoglobin that is a ferrous derivative of protoporphyrin and readily oxidizes to hematin or hemin -- called also protoheme

  • hemochromatosis

    Professional Description:

    An hereditary disease caused by increased absorption and excessive storage of iron in the tissues, especially the liver; the untreated disorder can lead to cirrhosis of the liver, heart disease, diabetes mellitus, testicular atrophy, and arthritis

  • Herbal products

    Professional Description:

    The word herb comes from the Latin word for grass. Technically, herbs are plants that wither each autumn, plants other than shrubs or trees. When used as a natural health product, herbs are plants with medicinal value.

  • Heritability

    Professional Description:

    The proportion of observed variation in a particular trait (as intelligence) that can be attributed to inherited genetic factors in contrast to environmental ones.

  • Herpes

    Professional Description:

    Herpes is a popular, ulcerative or vesicular eruption of skin or mucous membranes caused by a local infection with herpes virus 1 or 2 (herpes simplex) or by the reactivation of the varicella-zoster virus.

  • Herpes labialis

    Professional Description:

    Herpes labialis is herpes simplex that affects the lips and nose.

  • High intensity intermittent exercise

    Professional Description:

    Exercise that consists of alternating bouts of high and low intensity exercise. This type of exercise is seen in interval training and also “stop and go” type sports like soccer, hockey, football, basketball and rugby where fast sprints are interspersed with lower intensity phases.

  • high intensity physical activity

    Professional Description:

    High-intensity exercise is defined as working at about 75 to 85% or more of your maximum heart rate.

  • High risk for allergy

    Professional Description:

    An infant with a strong (biparental; parent, and sibling) family history of allergy; an infant with documented hereditary atopy risk (an affected parent or sibling).

  • Hirsutism

    Professional Description:

    The presence of excessive bodily and facial terminal hair, in a male pattern, especially in women. It typically occurs in adults as an expression of an ethnic characteristics or may develop in children or adults as the result of androgen excess due to tumors or drugs.

  • Histamine

    Professional Description:

    Histamine is a chemical present in cells throughout the body and is an essential neurotransmitter in a variety of processes. It is responsible for the release of gastric acid during digestion. Histamine is released during an allergic reaction and is one of the substances responsible for the symptoms of inflammation. It is the major reason for running of the nose, sneezing, and itching in allergic rhinitis. It also contributes to the narrowing of the bronchi (airways) in the lungs in asthma.

  • Homozygous

    Professional Description:

    Having the two genes at corresponding loci on homologous chromosomes identical for one or more loci.

  • Hooking

    Professional Description:

    the technique of hooking sets up a question that you want to be asked, leading the interviewer in a direction you want to go.

  • Hormone replacement therapy

    Professional Description:

    combined estrogen and progestin therapy or estrogen-only therapy (for women without an intact uterus).

  • Human Genome

    Professional Description:

    The complete genetic content (the complete set of genes) of a human.

  • hyerglucidic meal

    Professional Description:

    A mixed meal containing high glycemic index foods.

  • Hypercalciuria

    Professional Description:

    Clinically defined as urine calcium greater than 250 mg for 24 hours (6.2 mmol/day). Hypercalciuria is the most common abnormality associated with calcium oxalate stones.

  • Hyperemesis gravidarum

    Professional Description:

    Persistent vomiting that leads to weight loss greater than 5% of pre-pregnancy weight, with associated electrolyte imbalance and ketonuria, occurring in about 1% of pregnancies.

  • Hypersensitivity

    Professional Description:

    Presence of objectively reproducible symptoms or signs, initiated by exposure to a defined stimulus at a dose tolerated by normal subjects. Includes both immunologically and non-immunologically-mediated mechanisms

  • Hypertension

    Professional Description:

    Hypertension is abnormally high pressure in the arteries with a systolic pressure at rest that averages 140 mm Hg or more and/or a diastolic pressure at rest that averages 90 mm Hg or more.

  • Hypocitraturia

    Professional Description:

    A deficiency of the naturally occurring stone inhibitor citrate and clinically defined as urine citrate less than 450 mg for 24 hours (2.34 mmol/day). Following hypercalciuria, it is the second most common abnormality associated with calcium oxalate stone formation.

  • Hypodermoclysis

    Professional Description:

    Hypodermoclysis, also known as clysis, is the infusion of isotonic fluids into the subcutaneous space for rehydration or for the prevention of dehydration.

  • Hypoglycemia

    Professional Description:

    A state in which an individual has a low plasma glucose level (less than <4 mmol/L), experiences typical symptoms (trembling, palpitations, sweating, anxiety and/or neuroglycopenic symptoms- difficulty concentrating, confusion, weakness, dizziness, fatigue), and attains relief with the administration of a carbohydrate.